Your boss has something for you, but honestly "zero experience" isn't really a problem when it comes to saving with ETFs. That's actually the whole point: you don't need to understand how individual stocks work. With a savings plan, you simply buy shares regularly (monthly, weekly, whatever) from a big pool that contains hundreds or thousands of companies. That's way less stressful than picking individual stocks, and historically it's worked really well over longer periods.
Saving in a regular savings account honestly doesn't do much for you these days - interest rates are still low and inflation just eats away at your money. With ETFs, your money is at least participating in market growth. At 28, you also have time to ride out short-term fluctuations, which is a big advantage. You could start with a cheap all-world ETF, set up the savings plan, and then just forget about it.
The only thing you should pay attention to: do a quick check on which bank or broker has low fees (some charge nothing for savings plans). And only save money you really don't need, otherwise you won't sleep well. But you can drop the fear of stocks when it comes to ETFs as a long-term savings plan.